Trial of pipazethate as an antitussive.
D000328:Adult; D000996:Antitussive Agents / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003371:Cough / Q000188:drug therapy*; D006801:Humans; D008875:Middle Aged; D010919:Placebos
D000996:Antitussive Agents; D010919:Placebos